ICP DAS USA PCI-D64HU, User Manual, Page: 90 / 128

CHAPTER
4
Digital Input Functions
The functions in this chapter are provided for digital-input operations.
4.1 d64h_di_readport
VC6
short d64h_di_readport(BYTE bCardID, U32* pValue)
VB6
d64h_di_readport(ByVal bCardID As Byte, ByRef pValue As Long) As Integer
Description:
This function reads all digital-input, and stores the data into one 32-bit variable.
Parameters:
bCardID: The specific Card ID that is configured with the on-board Dip-Switch.
pValue: The pointer to the 32-bit variable that stores all digital-input.
Return Code:
SUCCESS_NO_ERROR: The function returns successfully.
ERROR_INVALID_CARD_ID: There is no active PCI-D64HU card configured with bCardID, or the
given Card ID is invalid (for instance, Card ID is assigned to 254).
ERROR_ACCESS_VIOLATION_DATA_COPY: Some system exception occurs while copying
memory, please check the pointer-type parameter you assign to this function.
ERROR_DI_PIO_READ: Cannot read the digital-input port, please call GetLastError() for further
system information.
PCI-D64HU Function Reference Version 18